Brake mechanism



sgpt. 21,1926;

' 1,600,786 H. EL NDERSN BRAKE MECHAN'ISM Fi-led Nov. 12, 1924 2sheetsfsheet 1' sepa 21 ,1926.

H. E. ANDERSON BRAKE MEGHANI SM Filed Nov. 12,

2 Sheets-#51189172 Nif) WWMVWVVUVW s preferably secured 'to the bracket26 by means ofbolts 27 which 'extend throughfthe v apertures 23, andhave suitable nuts threaded thereonjV "A bolt 28 also extends throughthe` slot 24` in the securing plate'22, such bolt terminating, beneaththerfurcations provided by the slotted'portion 24: of such plate, andhavinganut threaded-thereon and bearing against' the Vunder sides ofsuch furcations, this :manner ofi securing the'plate 22 being for thepurpose of preventing-the extension ofthe `bolt entirely through thesupport so as not to interfere with the rack C provided on the undersurface thereof.y The rack C comprises aplurality of transverselyvdisposed lteeth preferably formed integrally on theunder side ofthesupportV B, such rack preferably kextending from la point slightly toone side of the intermediate securing plate'21 in the direction of thevplate 22, to the end of thesupp'ort B, as

v'clearly shown'in` Figs. 4 to 6 inclusive.

The power multiplying' means `which cooperates with the racltQpreferablyincludes a'carrier member in the form of the.

j yoke. D, and upon such yoke are extensions v29, which have inwardlyturned hooked por# tions 30'provided Vwith spaced ribs 315-31 adapted toengage thel 'opposite side'sof the related flanges 25-25 of the supportB, such construction permitting longitudinal bodily movement of theyokeD along the support,

the arrangement-being such'fth'at the `iyoke travels in a straight lineand isl held against lateral'swinging or vertical displacement.

, The freeends of theyoke vD are provided with bearings vto Iaccommodatea pivot pin 32,` 'upon which is swingably mounted the lever means E.Such means preferably comprises a pair offslp'aced levers 33,having hubs33aL pivotally mounted on the pin ,32V

and held in Vspaced relationby a. connect-ing Yweb forming partof-mech'an'ism hereinafter referred to, the actuatingportio'ns`34'ofsuch levers extending `inwardlybetween the fur'-l cations of theyoke D', and ibeing pivotally connected together bymeans of apinPivotally mounted upon the pin 35 is one end of a link 36, vsuch beingcurved as shown, Vand the oppositel end thereof vhaving van eye 37connected to the portion 38 of the brakerigging '12, leading to thebrake mast 1l'.y The levers 34 zare-provided lwithfulinoperative'position.y

crum portions, preferably inthe form of mutilated gears 39, which in oneposition of the parts as hereinafterI explained cooperate with the teethupon the rack C.

The lever means supporting mechanism preferably comprises a U-shaped orforked supporting member 40, disposed between the furcations of the yokeD, and the portions 34 yof the levers 33,the bight 4l of such U-sliapedportion having. a block 42v prefer@` f ably formed integral with theinner end thereof as shown. Such block' preferably has a recess 43therein for the reception of an enlargement 44 formed on the end of aVstem 45, the outer end of such stem extend# ing through .a block`42?L,'preferably formed integraljwith the end of the yoke D, such stemhaving an eye 46, connected to the chain 47 of the brake rigging, whichin turn isv connected tothe equalizer bar 14 having connection with thebrake shoes lin the ordimanner. An expansible spring 48 is disposedabout the block42and the bloei?.

42, as clearly shown in Figs-4 to 6, for the purpose of'normallyholdingsuchlblocks in spaced relation. A

The Youter end portions of the legs of the U-shaped member areprovidedwith ceny tr'ally disposed semi-circular openings l49, adaptedto normally fit about the hubs 33 of the levers 33, and Voutwardlyinclined wedge portions 50 arey provided on such end portions onopposite sides of the openings 49, which are arranged to cooperate withwedge'portions 51 formed on the lever hubs.

By this arrangement the spring'48 presses.

the U-member 40 toward the pivot kpin 32, so that'the openings 49 andwedge portions 50 and 61 serve to retain the lever means in Independentadditional means are provided for supporting such leverlmeans ininoperative position, Such means includesa hooked portionI 52 formedbetween the `-levers'33, andeXtending rearwardly between the levers 33,such means serving to hold suchlevers in spacedprelation; The hookedportion 52 is normally engaged by a gravity actuated dog 54' pivotallymounted upon a pivot pin 55 provided on the U-shapedmember 40,'suchdoghaving a stop 56 adapted to engage the top edges of the U-'shapedmem# ber to prevent too-'great swinging movement man anti-clockwisemanner and a stop 5'? to? prevent'toogreat swinging ofv such dog inclockwise direction;

The operation of the device is as follows:

Upon rotation of the brakey staif 11 the'initial' tension yupon theportion 38 of the brake rigging is transmitted to the outer end of thelink 36, thence tothe innerf ends the levers 34, which bear upon thepivot pin 32 mounted on the endsof the yoke D. Theyoke D in turntransmits such power to the resilient means 48 which-bears against theblock 42, so that the power is transmitted to the'connecting member45and thence to the brake chain 47. This initial tension causes thepower multiplying mechanismv to move bodily along the track 25-25, the

- sults in the hubs 83 of the leversmoving out ot' the openings 49 inthe U-shaped'me'mber 40. This relative movementof the yoke D and theU-member40 also serves to Adraw the hooked portion52 of the lever meanstrom-v engagement with the dog 54, so that the lever means are tree toVmovedownwardly, which causes the actuatingportions 840i j the levers toswing outwardly bringing .about the engagement of the lfulcrum por-`.eli

tions 39 of the levers Ywith the rack C', as v shown. in Fig. 5resulting in 'a great increase in power. Upon release of Athe brakes,through the action of the spring 48, the lever means E are drawntoWardtheU- shaped member, and byreason of the en; gti-gement of thewedge portions 50 on the hubs 33 ot the lever with the wedge portiens 5lon the ends of the Ushaped fmember, the` lever means are centered withrespect to the openings 49. During this *moveinenttlie dog 54-isdisplacedupwardly until the same: drops into engagement beneath thehooked portion 52,'as in its original position. it should beparticularly observed that by reason o 'the construction describedv thepower-exerted upon 'the lever means is .in a 4.o

straight line longitudinally thereof, that is, the line 'ot' forceextends 'from the actuating ends of the lever meansthrough the pivot otsuch lever means, :to the source4 of power, so that there is nojtendencyof the lever `/means vto turn Vaboutits pivot and' so vprerinaturelyrelease Vthe power Vmultiplying means. rlhrough thisiarrangement lin`coniinction with lthe springV 48, and the wedge portions 50 and 5l, issuiiicient to' prevent premature swinging movement of the lever means,:tor the sake of safety, l preferably provide the auxiliary means l-lwhich posiv tively prevent the leverv means" assuming operative positionuntil the spring 48 has been fully compressed. It shouldalsov beparticularly observed that `due to the provision 'of the 'spaced levers,the spaced lulrum ends thereof, engaging the rack' C in spaced relation,all tendency of such levers to twist, because ofthe rela-tively greatpower applied thereto, isfully countermerely illustrative,and lcontemplate all changes and modifications that come within the scopeofthe claims appendedhereto.A lclaim:

l. In brake rigging, the c nbination with a power ii'ierhanism connectedthereto.; oi? power multiplying means associated with said mechanism,includingl lever means having an actuating portion normally extending toone side ot its pivot, and a `source of power at'th'e other sideot saidpivot and connectedtothe actuating portion of. saidv lever, saidactuating portion, pivot and source of power being, disposed in afcommonY plane during one phase of operation.`

' 2; ln a brake.. rigging, the/combination with apower mechanismconnected, thereto; l

ot power multiplying means associated with said mechanism, includinglever means-havf ing an actuating portion normally extending to one sideof itsV pivot, and sourceof power'at the other side o said pivotjandconnected to the actuating portion orfsaidV lever, whereby'f theforce"eXert`ed by said sourceo"` power passes ina straight 'line throughthe pivot of said leverfmeans; and means tor releasing said lever'means: from its normal inactive position to operate said powermultiplying'means. i

3. in a brake rigging, the combination with a power mechanism connectedthereto; oi" power multiplying means associa/ted with said mechanism,includinglever means have ing an actu-ating portion normally extend"-ing to' one side 'of itspivot, anda source of power at thebther side'of'said vpivot andv connected to the actuating portionpof said lever,wliereby'tl'ie `line of torce exerted by saidV source of power-passesthrong-li' the lpivot of Said lever means; means for releasing'saidlever means tromlits normal injplying means and means for'returning said vlever meansto-normall'y inactive position.,

` 4. lnY a brakev rigging, the combination with -a power mechanismconnected thereto; l

vof power multiplyingfmeans associated with' said mechanism, includinglever means hav- Y Vmeans whereby the yline of `force exert-'ed therebypasses through the A`pivot ofl *said 'i lever means; and" meansoperatedl by a predetermined resistancev forv releasing said lever`means' fromits normal inactive posi-f tion to -'operati-i'-saidv powermultiplying ln a brake rigging,` Y with a power A'mechanism connectedthereto; 'of power Vmultiplying means associa-tedw-ith ina' to one sideof' its pivot; a' source-of ing the combination Y Ilao Vsaid mechanism,inoludingll'ever mea-ns hav'- v power at the other side ot said pivotconnected to the actuating portion of said lever I means whereby theline of torce exerted thereby .passes through the pivot of said levermeans; means operated by increased resistance for Vreleasing said levermeans Y from its normal inactive position t'o operate said powermultiplying means;\and means for returning said. lever means to normallyinactive position. f

6. In a brake rigging, Ythe combination with a power mechanism connectedthereto; of power multiplying` means associated with said mechanismincluding lever means having an actuating. portionV normally extendingto one side of its pivot; means for supporting said Vlever means ininactive position; means for-releasing lever means; and a source ofpowerY at the other side of said pivot connected to the actuatingportion of said lever means whereby the line of force exerted thereby.passes through the pivot of said lever means.- '7. In` a `bralrerigging, the combination :with .a power mechanism connected thereto;

V'said mechanism including` lever means;

Vmeans -for'supporting said lever means at one point thereon, saidsupporting means being movable relatively to said lever means to releasethe same; and independent means for holding said lever" means ininactive position during movement of said support- -ing means fromsupporting position.

-9. In a brake rigging, the combination with a power mechanism connectedthereto; of power multiplying means associated with said mechanismincluding lever means; means for supporting said lever means atVone'point thereon, said supporting means Vbeing movable relatively tosaid lever means to `release the same; independent means for holdingsaid lever means in inactive position during movement of said supportingY means fromV supporting'position; and means 1 operable by apredetermined resistance for controllingjthe relative movement of saidsupporting means and said lever means.

10.1 In a lbrake rigging, the combination with a power .mechanismconnected vtherewith; of power multiplying means as. Vsociated withvsaid mechanism including pivoted lever means; means rvfor supportingsaid lever means operable by predetermined resistance to release thesame; and means for' retaining said lever means inactive until saidlever means are clear of said supporting means. l f

. .11. In abrake rigging, the combination with a powermechanismconnected thereto; of, power multiplying means associated with saidmechanism, including swingable lever means; a source of power spacedfrom said lever means and connected with the actuating portions thereof,the lbody portion oi' said lever means being disposed inthe line' otforce exerted by said source of power upon the actuatingportion of saidlever means.

12'.` In a brake rigging, the combination with a power mechanismconnected thereto; of power multiplying means associated with saidmechanism, including swingable lever means; a source of power. spacedfrom said-V lever means and connected with the actuatingpo-rtionthereof, the body portion of said Vlever means'being disposed inthe line of force exerted by said source of power'u'pon the actuatingportion of said lever means;

and means operable by variable resistanceV for-releasing said levermeans in one phase oi' operation,jand for returning the `same H' toinactive position during anotherv phase o'l operation.

13. In a brake rigging, the combination with a power mechanism,connected therewith; of power multiplying means associated with saidmechanism',4 including pivoted leverxmeans movable with reference tosaid power `mechanism to release thesame; and means free of said Vpivotfor retaining said lever means in inactive position during the movementtending to release the same. v

. 14. In a vbrake rigging, the combination with a power mechanismconnected therewith; of power multiplying means associatnieans having anactuating portion normal- ,110 ed with` said mechanism, including leverly extending to one side of its pivot; means..

for supporting said levermeans inv inactive position, said means beingmovable with referencerto said lever means to release the same; a sourceof power at the other side means for supporting said lever means ininactive position during its'movement to released position.

15. In a ybralre rigging, the combination` Vwith a power mechanism,connected therewith; of power multiplying meansy associated with saidmechanism, including lever means movable with reference to said powermechanism to releasethe same; 'means for ing to release the same; andmeans Aforreturning said lever means to inactive position, said mea-nsincluding` a device for guiding said lever means with respect to saidAsupportingmeans.

l". In a brake rigging, the combination with a power mechanismconnectedtherewith; of power multiplying means associated with saidmechanism, lincluding lever means comprising a plurality ot spaced leverVelements providing` tulcrum portions.l

v18. In Va brake rigging, Vthe combination with. power mechanismconnected therewith; of power multiplying means associated with saidmechanism, including lever means coinprising a plurality of spacedlevers having their actuating portions connected together and providing`a plurality of spaced tulcrum portions. Y m y y 19. In a brakev rigging,the combination with a power mechanism connected therewith; ot powermultiplying meansassociated with .said mechanism including lever meanscomprising a plurality vof spaced levers having their actuating portionsconnected together and normally extending to one side of the pivots ofsaid levers; anda source of power atjthe other lside of said pivotconnected to the actuating portions of said lever means, whereby theVline of torce exerted thereby .passes through the pivot of said. levermeans. fj i 20. In a brake rigging, the vcombination with a powermechanism connected there'- with; or" power multiplying means associatedwith .said mechanism including lever means; a source of powerconnectedwith the actuating portion of saidlever, means; and means for preventingtwisting of said lever means during operative movements thereof, saidmeans including K elements tor bracing said lever means y againstlateral stresses throughout its extent. Y

21. In a brake rigging, the combination with power/multiplying mechanismconnected therewith; of power multiplying means associated with saidmechanism including lever means comprising a plurality of spaced levers,the actuating portions of said levers extending to one side of thepivots thereof;

,a linlr connected to the actuating/portions of said levers, andextending tol the -fiother `side ot'said pivots; anda source of powerconnected to said link.

Ina brake rigging, the lcombination with power multiplying mechanismconnected utherewitlU-ot power `multiplying means associ-ated with saidmechanism including lever means comprising a plurality: loit spacedlevers, the actuating portions of said levers extending to one side ofthe pivots tliereof; a link connected to the actuating portions ot saidlevers, and extending to a point-beyond the pivot of said lever means;and a source ot power connected to said link being told-able betweensaidlevers. l Y

In a brake rigging, the combination with power multiplying mechanismconnected therewith; ot power Vvmultiplying means associated with :saidmechanism including lever means comprisinga plurality 'of spaced levers,the 'actuating portions otl saidY levers extending to one side of thepivots-thereof.; a link oonnectedfto the 'actuating porti-ons ot. saidlevers and extending-to a point be,- yond the pivots; a source ofpower'connected to said link; and means operable by predeterminedresistance y tor releasing said lever'means. i y i 24. Ina brakerigging-,the combination with a power mechanism connected .therewith.;of power multiplyingy means including swingablelevermeans inthe form ofa plurality of leve-rs having their actuating portions connected, ,andhaving ulcrum por-l tions disposed inspaced relation; a source of powerconnectedy ,withthe actuating portions ot said lever means, and spacedtherefrom, thel body port-ionsot said lever means i portions connected,and having-fulerum' portions disposed in spaced relationp a source ofpower connected with the-.actuating portionsof said levervmeans, andspaced therefrom, the body-portions l.otsaid lever means being `normallyldisposedV along the line of force exerted by said source ofpower Vonthe vactuating portions Vof said lever 1 means; and means operable yby avariable resistance ,tor'controllingthe movement of saidv lever vmeans.`

y 26. lIn a brake rigging, the :combination4 with a vpower 4mechanism.associated therewith; of a Ysupport'having meansv providing a pluralityof fulcrum locations; a carrier movably mounted on said support; levermeans swingably'mounted on said carrier,-vr

said lever means having an actuating porging, said support having meansfor the detachable receptionof said levei means, said lever means beingnormally held in position whereby the body portion of such `lever meansis disposed along the line oi iorce from said source of power to theactuating portion of said lever means; .and resilient means interposedbetween said carrier and said supporting member.

' 27. 'In' a brake rigging, the combination VVwith a power mechanismassociated therewith; of a support having means providinga'pluralitypotl fulcrum locations; of a carrier movably Vmounted on saidsupport; levermeans swingably mounted on said carrier, said lever meanshaving actuating vportions connected to one end of said brake wrigging,and having spaced fulcrum portions arranged in one position to cooperatewith said tulcrum locations; a supporting member mounted on saidcarrier, and connected `with the other end of said brake rigging, saidsupport having meansfor retaining said lever means in inoperativeposition; and resilient means interposed between said carrier and saidsupport.

28.7In a brake rigging, the combinationy with a` power mechanismassociated therewith; ofV a support having means providing .a pluralityof fulcruin locations; of a carrier movably -mounted on saidk support;lever means swingably mounted on said carrier, said lever means havingactuating portions connected to one end of'said brake rigging, Vandhaving spaced fulcrum portions arranged in one position to cooperatewith 'said fulcrum locations; a supporting member mounted on saidcarrier, and connected with the other end of said brakeri'gging,said-support having meansfor retaining said lever means in inoperativeposition; and resilient means interposed between said carrier and saidsupport, said `supporting means being providedwith wedge portions icooperating with wedge portions upon said lever meansfor positioningsaid lever means with reference to said supporting member.

29. In a brake rigging, the combination with a power mechanism connectedtherewith; of a support having means providing a plurality of fulcrumlocations; a carrier movably mounted on said support; lever meansswingably mounted upon said carrier, said lever means having itsactuating portions connected with one end of said brake rigging, andhaving ulcrum portions arranged to cooperate with said ulcrum locationsin certain positions; a supporting member connected to the other end ofVsaid brake rigging; resilient means interposedy between said carrier andsaid supporting member; and means for retaining said lever means ininoperative position during rela-V witha `power mechanism connectedtherewith; oi a support having means providing v a plurality of fulcrunilocations; a carrier y movably mounted on said support; a plurality ofvspaced levers pivotally mounted on said carrier, said levers having theactuating portions connected, said spaced levers providing a pluralityot ulcrum portions cooperable with said fulcrum locations in certainpositions of the parts; a source of power spaced Jfrom said actuatingportionV and connected thereto, the body portions of f said leversbeing'disposed along the line of force exerted by said source of powerupon the actuating portions of said levers; a supporting member mountedon said carrier and'connected to the other end of said brake rigging,said supporting member being provided with means for the' reception ofportions of said levers, said supporting Vmeans also having wedgeportions cooperating with wedge portions on said levers forpositioningsaid levers with respect to said supporting member; and meansfor retaining said lever means inactive lduring certain relativemovements of said support and said carrier, said'means being in the formofa pivoted dog and a cooperating hooked portion. i

31.-In a brake rigging, the combination with a power mechanism; of asupport having laterally disposed flanges providing a track; of acarrier provided with hooked portions having means slidably mounted onthe langesof said track; lever means pivotally mounted on said carrierand connected to one end ofsaid brake rigging; a supporting memberconnected to the other end of said brake rigging and Vhaving meansadapted to retain said lever means in inoperative position; andresilient means interposed between said carrierand said supportingmember.

'In witness that I claim thel foregoing I have hereunto subscribedmyname this 7th day of November, 1924. f

HARLEY E. ANDERSON.

